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20. EXHAUST EMISSION CONTROL
SYSTEM GRAND DINK 125/150
SCHEMATIC DRAWING
EXHAUST EMISSION CONTROL SYSTEM
The exhaust emission control system adopted in this model utilizes the reed valve to draw
secondary air into the exhaust system for re-combustion by means of exhaust pulsation so as to
minimize the exhaust emission.
FUNCTION
Item Purpose Function
It filters the fresh air drawn for re-burning to
Secondary Air Filter secondary air. prevent dirt or dust from affecting the operation of
Cleaner the air injection cut-off valve.
The air injection cut-off valve usually opens to
lead air into the exhaust muffler in which air is re-
Prevent exhaust
Air Injection Cut- muffler noise and burned to reduce CO. When the throttle valve
off Valve closes suddenly, the air injection cut-off valve is
backfiring at sudden actuated by vacuum to close and cut off secondary
deceleration. air in order to prevent exhaust muffler backfiring
due to air in the exhaust system.
Control the secondary Whenthe reed valve operatesis less than 50km per
the motorcycle speed
Reed Valve hour, to draw secondary air
air inlet to reduce CO.
into the exhaust system for re-combustion.
20-1